RU2556851C1 - Sampling device - Google Patents

Abstract

FIELD: oil and gas industry.SUBSTANCE: sampling device contains a main pipeline, a sampling section joined with the main pipeline with a possibility of sampling with coverage of liquid flow cross section, a sampling tap and a manometer. The sampling tap is designed as housing and bushing which is rigidly joined with a handle, and in a starting position the bushing shuts a drain hole of the housing, and the handle can move together with the bushing, opening the drain hole of the housing in working position. The hollow cylinder with the central channel is installed in the main pipeline, and the hollow cylinder from side of liquid flow movement is fitted with the input cone tapering the flow and the output cone expanding the flow on the other side of the hollow cylinder. The whirler fitted inside with tangential channels is installed in the central channel of the hollow cylinder from the input cone. The bushing of the sampling tap covers hermetically from outside the housing with the drain hole and can move restrictedly in axial direction with reference to the housing. The housing has the first and second external cylindrical grooves and the cutting spring lock ring is located inside. The bushing is fitted with internal ring sampler.EFFECT: improvement of quality of liquid sampling, improvement of operational reliability of the sampling tap and increase of level of correctness of identified process parameters of wells and layers according to analyses of samplings.2 dwg

Description

The invention relates to the production, collection, preparation and transport of liquid and gas products and can be used in oil and gas companies, where work is carried out on sampling fluid from pipelines.

A sampling device is known (patent RU No. 2298096, IPC E21B 49/08, G01N 1/10, published in Bulletin No. 12 of 04/27/2007), comprising a main pipeline, a sampling section fixed to the main pipeline with the possibility of sampling with coverage of the cross section of the fluid flow, select tap, pressure gauge, characterized in that the sampling section at the inlet of the fluid flow inside the main pipeline is equipped with a nozzle with radial holes placed against the fluid flow, with a beveled upper end, while a cut of the beveled upper end placed on the opposite side of the radial openings of the nozzle, moreover, a restriction flow device is installed behind the nozzle in the main pipeline, and the select valve is made in the form of a gate-valve spring-loaded relative to the sampling section, a body with a drain hole and a coil, and the gate-valve is hermetically installed inside the case, made of dielectric material, and the coil is located on the housing, moreover, in the initial position, the gate-valve overlaps the drain hole of the housing, and in the work The electromagnetic field generated by the coil when an electric current is applied to it has the possibility of axial movement inside the housing, compressing the spring and opening the drain hole of the housing.

The disadvantages of this device are:

- firstly, the low quality of the samples taken, which do not allow to reliably determine the water cut of the product, since the sampling takes place through the beveled upper end of the pipe, which cannot provide full coverage around the entire perimeter of the cross-section of the layered fluid flow in the pipeline, which means through the beveled the upper end of the nozzle, the fractions located on the periphery of the main pipeline and, as a result, distorted by the volumetric flow rate of the fractions of phases (water, oil) in the flow do not enter the sampling section;

- secondly, the low reliability of the selected crane in operation, associated with a high probability of failure of the gate-gate, triggered by the electromagnetic field generated by the coil when an electric current is applied to it;

- thirdly, a low degree of correctness of the determined technological parameters (reservoir pressure, bottomhole pressure, productivity coefficient) of wells and reservoirs by analysis of selected samples;

- fourthly, the presence of an electric current source for opening (closing) a selective tap.

Also known is a sampling device (RU patent for utility model No. 40391 IPC 7 E21B 49/08, F17D 3/10, published in Bulletin No. 25 dated September 10, 2004) mounted on the main pipeline and made in two sections, fixed to the main pipeline by means of flange connections, and equipped with adjustable three-way ball valves, a select valve and a manometer, while the three-way ball valves are connected by a shaft with a control lever with the ability to alternately cut off one of the sections, and each of the sections is made with the possibility of skipping in its fluid flow, wherein one of the sections is the bypass, and the other - the sample (dimensional), with sampling covering the cross-sectional liquid flow without any loss.

The disadvantages of this device are:

- firstly, the complexity of the design, due to the large number of nodes and parts, as well as bulkiness and metal consumption;

- secondly, with frequent sampling, the parts of the selection tap wear out and it loses its tightness, which reduces the life of the device as a whole and requires an audit of the sealing elements of the selection tap or its complete replacement;

- thirdly, the low quality of the samples taken, which do not allow to reliably determine the water content of the products;

- fourthly, a low degree of correctness of the determined technological parameters (reservoir pressure, bottomhole pressure, productivity coefficient) of wells and reservoirs by analysis of selected samples.

The closest in technical essence and the achieved result is a sampling device (patent RU No. 2292514, IPC F17D 3/10, published in Bulletin No. 3 dated January 27, 2007) containing a main pipeline, a sampling section fixed to the main pipeline with the possibility of sampling with coverage of the cross section of the fluid flow, a sampling valve, a pressure gauge, while the sampling section at the inlet of the fluid flow inside the main pipeline is equipped with a nozzle with radial openings placed against the fluid flow, with a beveled upper the end, while the cut of the beveled upper end is placed on the side of the nozzle opposite the radial holes, and the device restricting the flow is installed behind the nozzle in the main pipeline, and the select valve is made in the form of a sleeve rigidly connected to the handle and hermetically installed inside the case, equipped with a through horizontal groove through which the aforementioned handle is passed, while in the initial position, the sleeve overlaps the drain hole of the housing, and the handle by means of a support ring is spring-loaded relative to the housing and has the possibility of axial movement together with the sleeve, opening the drain hole of the housing in the working position. The disadvantages of this device are:

- firstly, the low quality of the samples taken, which do not allow to reliably determine the water cut of the product, since the sampling takes place through the beveled upper end of the pipe, which cannot provide full coverage around the entire perimeter of the cross-section of the layered fluid flow in the pipeline, which means through the beveled the upper end of the nozzle, the fractions located on the periphery of the main pipeline and, as a result, distorted by the volumetric flow rate of the fractions of phases (water, oil) in the flow do not enter the sampling section;

- secondly, the low reliability of the selected crane in operation, associated with a high probability of failure of the compression spring under alternating loads (opening and closing of the selected crane);

- thirdly, a low degree of correctness of the determined technological parameters (reservoir pressure, bottomhole pressure, productivity coefficient) of wells and reservoirs by analysis of selected samples.

The technical task of the proposal is to improve the quality of fluid samples taken, increase the reliability of a selected tap in operation, and increase the degree of correctness of the determined technological parameters of wells and reservoirs by analyzing selected samples.

The stated technical problem is solved by a sampling device containing a main pipeline, a sampling section fixed to the main pipeline with the possibility of sampling with a cross-section of the fluid flow, a sampling tap and a pressure gauge, and the sampling section at the inlet of the liquid flow inside the main pipeline is equipped with a nozzle, while the pressure gauge installed on the pipe in front of the selection valve, and behind the pipe in the main pipeline there is a device that restricts the flow, the selection valve is made in the form the housing and sleeve are rigidly connected to the handle, wherein in the rest position the sleeve covers the drain opening of the housing and the handle is movable together with the sleeve, opening the drain hole in the housing operating position.

What is new is that a hollow cylinder with a central channel is installed in the main pipeline, and the hollow cylinder on the side of the fluid flow is equipped with an inlet cone that narrows the flow and an outlet cone that expands the flow on the other side of the hollow cylinder, and into the central channel of the hollow cylinder on the side of the inlet cone, a swirler is installed, provided with tangential channels inside, while the swirl opposite the inlet cone is muffled and provided with radial grooves, and in the central channel of the hollow cylinder it will swirl the pipe of the sampling section for fluid flow inlet is placed, communicating with the select valve, while the sleeve of the selective valve seals outside the housing with a drain hole and has the possibility of limited axial movement relative to the housing, while the housing is equipped with first and second external cylindrical grooves, and the sleeve is equipped an inner ring sample in which a split spring circlip is disposed, wherein in the initial position, the split spring circlip is fixed in the first outer cylindrical groove of the housing and has the ability to compress the split spring retaining ring in the inner annular selection of the sleeve with axial movement of the sleeve relative to the housing and fixing the split spring retaining ring in the second outer cylindrical groove of the housing in the operating position.

The figure 1 shows the proposed sampling device.

The figure 2 shows a section aa of the proposed sampling device.

The sampling device comprises a main pipe 1 (see Fig. 1), a sampling section 2, fixed to the main pipe 1 with the possibility of sampling with coverage of the cross section of the fluid flow, a sampling valve 3 and a pressure gauge 4.

The sampling section 2 at the inlet of the fluid flow inside the main pipe 1 is equipped with a pipe 5.

A pressure gauge 4 is installed on the pipe 2 in front of the selective valve 3, and behind the pipe 2 in the main pipe 1 there is a device that restricts the flow, 6.

The selection valve 3 is made in the form of a housing 7 and a sleeve 8, rigidly connected to the handle 9. In the initial position, the sleeve 8 overlaps the drain hole 10 of the housing 7, and the handle 9 has the ability to move together with the sleeve 8, opening the drain hole 10 of the housing 7 in the working position .

In the main pipe 1, a hollow cylinder 11 with a central channel 12 is installed. The hollow cylinder 11 is equipped with an inlet cone 13, narrowing the flow, and an outlet cone 14, expanding the flow on the other side of the hollow cylinder 11, from the side of the fluid flow.

In the central channel 12 of the hollow cylinder 11 from the side of the inlet cone 13, a swirler 15 is installed (see FIGS. 1 and 2), provided with tangential channels 16 inside. For example, the swirl 15 is made in the form of a glass, in which the tangential channels 16 are made in the form of a screw with tangential shoulder blades.

The swirler 15 opposite the inlet cone 13 is plugged and provided with radial grooves 17. In the central channel 9 (see Fig. 1) of the hollow cylinder 8 behind the swirl 15 is placed a pipe 5 of the sampling section 2 for entering the fluid flow, communicating with a selection valve 3.

The sleeve 8 of the selection valve 3 hermetically by means of sealing rings 18 covers the outside of the housing 7 with a drain hole 10 and has the possibility of limited axial movement relative to the housing 7.

The housing 7 is equipped with a first and second outer cylindrical grooves 19 and 20, respectively, and the sleeve 8 is equipped with an inner annular selection 21, in which a split spring circlip 22, for example, of circular cross section, is placed.

In the initial position, the split spring circlip 22 is fixed in the first outer cylindrical groove 19 of the housing 7 and has the ability to compress the split spring circlip 22 in the inner annular selection 21 of the sleeve 8 while axially moving the sleeve 8 relative to the housing 7 and fixing the split spring circlip 22 the second outer cylindrical groove 20 of the housing 7 in the working position.

The sampling device operates as follows.

During movement along the main pipeline 1 (see Figs. 1 and 2), the fluid flow, having reached the hollow cylinder 11, narrows along the inlet cone 13 and is directed to the swirler 15. The fluid flow through the radial grooves 17 of the swirler 15 enters the tangential channels 16, where twists. As a result, turbulence of the fluid flow is created and due to centrifugal force the mixed liquid phase moves along the peripheral part of the central channel 12 of the hollow cylinder 11 behind the swirl 15. In the central channel 12 (see Fig. 1) of the hollow cylinder 11 behind the swirl 15 the fluid flow is mixed and closed sampling tap 3 of the sampling section 2 is divided into two directions:

- first, from the Central channel 12 of the hollow cylinder 11 through the outlet cone 14, the fluid flow expands and enters first into the main pipe 1, and then into the device, restricting the flow, 6 and then again into the main pipe 1 after the sampling section 2;

- the second, through the nozzle 5, the fluid flow flows down and enters the sampling section 2, where, filling its internal space, the fluid flow and through the nozzle 5 behind the selection valve 3, again flows into the main pipe 1 behind the device, restricting the flow, 6 and connects to flow moving in the first direction.

With a constantly working main pipeline 1, the fluid flow moves along its entire cross-section in two directions and the sampling section 2 is constantly filled with a fluid sample with a composition corresponding to the time and conditions of its selection without the formation of stagnant zones.

A pressure gauge 4 is installed in the sampling section 2 in order to control the pressure during operation and sampling.

Sampling is as follows.

The select valve 3 is opened by physically acting on the handle 9 towards the second outer cylindrical duct 20 of the housing 7, while the split snap ring 22, which is in the initial position, engaged with the first outer cylindrical groove 19 of the housing 7, is compressed in the inner ring 21 of the sleeve 8 and disengages from the first outer cylindrical groove 19 of the housing 7.

For the handle 9, the sleeve 8 is moved relative to the stationary housing 7 until the split spring circlip 22 is radially compressed and engages with the second outer cylindrical groove 20 of the housing 7, in which the split spring circlip 22 is fixed, occupying the working position.

At a certain point, in the process of moving the sleeve 8 relative to the fixed body 7, the drain hole 10 of the housing 7 of the select valve 3 opens, and a pressure decrease behind the device restricting the flow 6 occurs, due to rarefaction due to the opening of the drain hole 10 of the housing 7 of the select valve 3. As a result, the entire fluid flow from the central channel 12 of the hollow sleeve 11 rushes in the second direction, i.e. the fluid flow is directed only to the sampling section 2 through the pipe 5 and the housing 7 of the sampling tap 3 and through the drain hole 10 of the housing 7 of the sampling tap 3 is discharged into a container (not shown in Figs. 1 and 2) intended for sampling.

The layered liquid phase, moving along the entire cross section of the main pipe 1 (see Fig. 1), due to the presence of centrifugal force (tangential channels 16 in the swirler 15) is mixed in the central channel 12 of the hollow cylinder 11 and behind the swirler 15 and moves along the peripheral part of the central channel 12 of the hollow cylinder 11, therefore, when sampling through the pipe 5 of the sampling section 2, the mixed liquid, rather than the layered liquid phase, enters the sampling container, as described in the prototype, which allows a high degree of identity ifikatsii selected samples with the real volume flow phase fraction (water, oil) in the stream.

According to the results of the analysis of selected samples using the proposed sampling device, the accuracy of the determined technological parameters (reservoir pressure, bottomhole pressure, productivity coefficient) of wells and reservoirs increases.

Having collected the required sample volume, close the selection valve 3. To do this, carry out a physical impact on the handle 9 in the direction of the first outer cylindrical groove 19 of the housing 7, while the split spring retaining ring 22, which is in the working position, is engaged with the second outer cylindrical groove 20 of the housing 7 , is compressed in the inner ring sample 21 of the sleeve 8 and disengages from the second outer cylindrical groove 20 of the housing 7.

For the handle 9, the sleeve 8 is moved relative to the stationary housing 7 until the split spring retaining ring 22 is radially compressed and engages with the first outer cylindrical groove 19 of the housing 7, occupying the initial position in which the select valve 3 is closed.

The absence of a compression spring in the design of the device eliminates the possibility of its breakdown during the opening and closing of the select valve 3 and its failure, in connection with which the reliability of the select valve in operation increases.

The proposed device allows to improve the quality of fluid samples taken, to increase the reliability of the selected tap in operation and to increase the degree of correctness of the determined technological parameters of wells and reservoirs by analyzing the selected samples.

Claims (1)

A sampling device comprising a main pipeline, a sampling section fixed to the main pipeline with the possibility of sampling with coverage of the cross section of the fluid flow, a sampling tap and a pressure gauge, the sampling section at the inlet of the fluid flow inside the main pipeline being equipped with a nozzle, with the pressure gauge mounted on the nozzle in front of selective tap, behind the nozzle in the main pipeline there is a narrowing device, and the selective tap is made in the form of a housing and a sleeve rigidly connected to the arm at the same time, in this case, in the initial position, the sleeve overlaps the drain hole of the housing, and the handle can be moved together with the sleeve, opening the drain hole of the housing in the working position, characterized in that the hollow cylinder with the central channel is installed in the main pipeline, the hollow cylinder on the driving side the fluid flow is equipped with an inlet cone, narrowing the fluid flow, and an outlet cone, expanding the fluid flow on the other side of the hollow cylinder, while in the Central channel of the hollow cylinder from the input in one cone, a swirler is installed, provided with tangential channels inside, while the swirl opposite the inlet cone is muffled and provided with radial grooves, and in the central channel of the hollow cylinder behind the swirl is a sampling pipe for fluid flow inlet, which communicates with a select valve, and the sleeve of the select valve is hermetically sealed from the outside covers the housing with a drain hole and has the possibility of limited axial movement relative to the said housing, while the body of the selected crane is equipped with n the first and second outer cylindrical grooves and therein is arranged a split spring retaining ring, and the sleeve is equipped with an internal annular selection, and in the initial position, the split spring retaining ring is fixed in the first outer cylindrical groove of the body of the select valve and has the ability to compress the split spring retaining ring in the inner annular sampling of the sleeve with axial movement of the sleeve relative to the casing and fixing the split spring retaining ring in the second an outer cylindrical housing bore selective tap in working position.

Images